diff --git a/e2e/protractor.excludes.json b/e2e/protractor.excludes.json
index 1157e609c1..86043f9a08 100644
--- a/e2e/protractor.excludes.json
+++ b/e2e/protractor.excludes.json
@@ -1,5 +1,11 @@
 {
   "C269081": "https://alfresco.atlassian.net/browse/ADF-5385",
   "C272819": "https://alfresco.atlassian.net/browse/ADF-5385",
-  "C362241": "https://alfresco.atlassian.net/browse/ADF-5385"
+  "C362241": "https://alfresco.atlassian.net/browse/ADF-5385",
+  "C246534": "https://alfresco.atlassian.net/browse/ACS-4468",
+  "C268151": "https://alfresco.atlassian.net/browse/ACS-4467",
+  "C260377": "https://alfresco.atlassian.net/browse/ACS-4467",
+  "C260375": "https://alfresco.atlassian.net/browse/ACS-4467",
+  "C286290": "https://alfresco.atlassian.net/browse/ACS-4467",
+  "C286472": "https://alfresco.atlassian.net/browse/ACS-4467"
 }
diff --git a/lib/core/src/lib/services/thumbnail.service.spec.ts b/lib/core/src/lib/services/thumbnail.service.spec.ts
index 3dd1b288e6..2e5b5576c1 100644
--- a/lib/core/src/lib/services/thumbnail.service.spec.ts
+++ b/lib/core/src/lib/services/thumbnail.service.spec.ts
@@ -56,4 +56,8 @@ describe('ThumbnailService', () => {
         spyOn(service['contentApi'], 'getDocumentThumbnailUrl').and.returnValue('/fake-thumbnail.png');
         expect(service.getDocumentThumbnailUrl('some-id')).toContain('/fake-thumbnail.png');
     });
+
+    it('should return the correct icon for a mht file', () => {
+        expect(service.getMimeTypeIcon('multipart/related')).toContain('ft_ic_website.svg');
+    });
 });
diff --git a/lib/core/src/lib/services/thumbnail.service.ts b/lib/core/src/lib/services/thumbnail.service.ts
index a5684c4bec..4203f28177 100644
--- a/lib/core/src/lib/services/thumbnail.service.ts
+++ b/lib/core/src/lib/services/thumbnail.service.ts
@@ -160,7 +160,8 @@ export class ThumbnailService {
         filter: './assets/images/ft_ic_filter.svg',
         'save-as': './assets/images/save-as.svg',
         save: './assets/images/save.svg',
-        task: './assets/images/task.svg'
+        task: './assets/images/task.svg',
+        'multipart/related': './assets/images/ft_ic_website.svg'
     };
 
     _contentApi: ContentApi;